1. Department of Pathology and Laboratory Medicine, King Fahad Specialist Hospital, Dammam, P. O. Box 15215, Saudi Arabia
2. Department of Clinical Laboratory Science, College of Applied Medical Sciences, University of Dammam, Al Khobar, P. O. Box 2435, Saudi Arabia
3. Department of Microbiology, College of Medicine, University of Dammam, Al Khobar, P. O. Box 2208, Saudi Arabia